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Intel&reg; Integrated Performance Primitives MP3 Floating-Point Based Encoder  
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<h1>
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Intel&reg; Integrated Performance Primitives  
<br>
MP3 Floating-Point Based Encoder  
</span>
</i>
</h1>
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<h5>
<A HREF="#Overview">
Overview  
</A>
<BR>
<A HREF="#Package_Contents">
Package Contents  
</A>
<BR>
<A HREF="#Known_Limitations">
Known Limitations  
</A>
<BR>
<BR>
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<h2>
<a NAME="Overview">
</a>
Overview  
</h2>
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<span lang="EN-US">
This sample illustrates how to use the Intel  
<sup>
&reg;  
</sup>
Integrated Performance Primitives (Intel  
<sup>
&reg;  
</sup>
IPP) signal processing and audio coding functions to implement a simple floating-point based MPEG-1/2 encoder.  
</span>
<h4>
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The following compression modes are supported:  
<br>
MPEG-1: layers1,2,3  
<br>
MPEG-2, low sampling frequencies extension: layers1,2,3  
<br>
MPEG-2, multichannel extension: layer2 within single stream  
</span>
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<P>
Additional information on this software as well as other Intel software performance products is available at  
<A HREF="http://developer.intel.com/software/products/">
http://developer.intel.com/software/products/  
</A>
.  
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<a NAME="Package_Contents">
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Package Contents  
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The  
<b>
Intel  
<sup>
&reg;  
</sup>
IPP MP3 Floating-Point Based Encoder  
</b>
package contains the following files:  
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<b>
.\ipp_sample\audio-video-codecs\codec\mp3_enc\  
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readme.htm  
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This file  
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.\ipp_sample\audio-video-codecs\codec\mp3_enc\include\  
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mp3enc_own_fp.h  
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MPEG audio encoder internal header file  
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umc_mp3_encoder.h  
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MPEG audio encoder UMC interface  
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<b>
.\ipp_sample\audio-video-codecs\codec\mp3_enc\src\  
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mp3enc_api_fp.c  
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MPEG audio top-level interface functions  
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mp3enc_layer3_fp.c  
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Source file containing implementation of layer 3 specific functions  
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mp3enc_mc_fp.c  
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Source file specific to multichannel encoding  
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mp3enc_pa_tabs_fp.c  
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Source file containing psychoacoustics model tables  
</span>
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mp3enc_psychoacoustic_fp.c  
</td>
<td style="padding: 0.75pt" width="329">
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Source file containing&nbsp; implementation of psychoacoustics model  
</span>
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mp3enc_quantization_12_fp.c  
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Source file containing implementation of layers 1,2 quantization block  
</span>
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mp3enc_quantization_fp.c  
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Source file containing implementation of layer3 quantization block  
</span>
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umc_mp3_encoder.cpp  
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MPEG audio encoder UMC interface implementation  
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<h2>
<a NAME="Known_Limitations">
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Known Limitations  
</h2>
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The encoder supports the standard ISO/IEC 11172-3 with certain restrictions.  
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MPEG-2&nbsp; multichannel extension: layers 1,3&nbsp; are not supported in the current version  
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MPEG-2&nbsp; multichannel extension: layer2 with extension stream is not supported in the current version  
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&nbsp;  
<br>
Copyright &copy; 2002-2008 Intel Corporation. All rights reserved.  
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